diff --git a/Introduction-to-JOJ3.md b/Introduction-to-JOJ3.md
index b496686..25ef8f3 100644
--- a/Introduction-to-JOJ3.md
+++ b/Introduction-to-JOJ3.md
@@ -58,9 +58,9 @@ Invalid commit message:
 git commit -m""  # message missing
 git commit -m"my 1st commit message" # not following conventional commit format
 git commit -m"feat: skeleton" # missing scope
-git commit -m"joj(h1/e2): test" # wrong format, joj is not a valid type
+git commit -m"joj(h1/ex2): test" # wrong format, joj is not a valid type
 git commit -m"	增加 ex2.c" # never commit with non-ascii characters in your message
-git commit -m"feat(h1/e2)： skeleton" # not a regular : symbol
+git commit -m"feat(h1/ex2)： skeleton" # not a regular : symbol
 ```
 
 If at any stage you push with an invalid commit you can easily fix it be pushing an empty commit, eg.